/**
 * Copyright (C) 2010-2013 Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.rocketmq.client.impl.consumer;

import org.slf4j.Logger;

import com.alibaba.rocketmq.client.impl.factory.MQClientInstance;
import com.alibaba.rocketmq.client.log.ClientLogger;
import com.alibaba.rocketmq.common.ServiceThread;

/**
 * Rebalance Service
 * 
 * @author shijia.wxr<vintage.wang@gmail.com>
 * @since 2013-7-24
 */
public class RebalanceService extends ServiceThread {
	private final Logger log = ClientLogger.getLog();
	private final MQClientInstance mqClientFactory;

	public RebalanceService(MQClientInstance mqClientFactory) {
		this.mqClientFactory = mqClientFactory;
	}

	private static long WaitInterval = 1000 * 10;

	// 消费端会通过RebalanceService线程，10秒钟做一次基于topic下的所有队列负载
	@Override
	public void run() {
		log.info(this.getServiceName() + " service started");

		while (!this.isStoped()) {
			this.waitForRunning(WaitInterval); // 休息10s
			// ***************************************
			this.mqClientFactory.doRebalance();
		}

		log.info(this.getServiceName() + " service end");
	}

	@Override
	public String getServiceName() {
		return RebalanceService.class.getSimpleName();
	}
}
